Sub Floor for Wood Block Flooing

[ptowers49]

I have some reclaimed wood block flooring which I plan to glue down as part of a house renovation.
Can the wood block floor be glued directly to the existing floorboards if I screw them down first? I am recluctant to add a 6mm ply base as this would raise the level.

 

[WoodYouLike]

No. The flex and natural movement of your existing floorboards will cause yoru wood blocks to move too and create gaps etc.
6mm ply isn't thick enough to prevent this either. Use 12mm and screw every 25cm.
Or.... remove existing floorboards and replace with 18mm plywood.

 

[ptowers49]

No. The flex and natural movement of your existing floorboards will cause yoru wood blocks to move too and create gaps etc.
6mm ply isn't thick enough to prevent this either. Use 12mm and screw every 25cm.
Or.... remove existing floorboards and replace with 18mm plywood.

Is it ok to replace existing with 18mm floor grade chipboard?

 

[HardwoodGuy]

Hard to say. The older stuff was definately a non-no. I'm a newbie here so UK terms kind of throw me off but this is the definition I get on the product...

"High density particleboard"

http://www.wickes.co.uk/Sheet-Chipboard-Flooring/Tongued-and-Grooved-Chipboard-Flooring/invt/164516

I'd be curious if anyone does have experience with the product.

 

[WoodYouLike]

Is it ok to replace existing with 18mm floor grade chipboard?

No, modern floor grade chipboard isn't suitable to glue onto I'm afraid. Or you'll have to use special design parquet chipboard we still can get hold of. 830 x 1250mm sheets.